Even if you brush your teeth twice a day, in between your mouth will be like AAAG unless you kiss right after. And you can't kiss chewing gum, and it's kinda disgusting to watch a guy say "excuse me" and turn around and pull his gum out. I find tic tacs don't last very long at all, and mints that do last long don't last long after they're gone and you don't want to kiss with them in! I'd suggest Listerine strips. They're these strips that you put on your tongue, at first they're quite strong but they're long lasting, get the job done, and don't roll around in your mouth. (They dissolve on your tongue.) The package is pretty small and will fit discretely in your pocket. For quick fixes, maybe a breath spray, though they are bulky and don't fit in your pocket well. (You don't want to be walking around and have it fall out! lol) Good luck!